JPH1089709A - Control method for floor heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To block a heating medium liquid pressure of a main piping system which acts on a floor heating piping of each room and prevent water leakage of a floor heating piping especially for a lower floor without providing an emergency shut down device under automatic control or a water leakage detection device, or stop the operation automatically. SOLUTION: The end of each inlet and the end of each outlet of a heating medium liquid circulation pipe 7 are connected to a heating medium liquid supply header 5s and a heating medium liquid return header 6r in parallel respectively, while a heating medium bypass circuit is formed between a branch pipe 5 on the supply side and a branch pipe 6 on the return side. A directional control valve 10 and a control unit 11 are provided, which selectively bypass the heating value liquid of the supply side branch pipe 5 to the return side branch pipe 6 by way of a bypass pipeline 9 while a check valve 28 is provided, which prohibits a backward flow of the heating value liquid from the return line 4 to a heating value liquid circulation pipeline, thereby preventing the internal pressure of a main piping system from being spread to the heating value liquid return header 6r during the circulation shutdown of the main value liquid circulation pipe 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a floor heating device of a hot water piping system, and more particularly, to a method of controlling a heat medium circulating pipe such as a hot water pipe laid on a building floor. The present invention relates to a method of controlling a floor heating device that circulates liquid (hot water) and heats each room to a desired temperature.

[0002]

2. Description of the Related Art A heating medium circulation pipe is laid on a floor of a living room of a building to circulate a heating medium liquid (antifreeze, etc.) heated by a boiler and heat each room or each floor heating area. Underfloor heating systems of the type are known. FIG. 6 shows a configuration of a conventional floor heating device. In the floor heating device 50 shown in the figure, one or several headers 51 are arranged in a centralized management facility of a building such as a machine room, regardless of the number of rooms, to supply a heating medium liquid (hot water). A heating medium liquid supply source 54 including a boiler 52 and a pump 53 is connected to the header 51. In each of the chambers Rx and Ry, each heat medium liquid circulating pipe 55x and 55y of each chamber system is provided with a header 5
Each is piped from 1. Each room Rx, Ry is room R
Heating is performed by circulating the heat medium liquid through the heat medium liquid circulation pipes 55x and 55y constituting the heat medium liquid circulation circuits x and Ry, respectively. The temperature control of the heating temperature of each room Rx, Ry controls the hot water temperature of the entire heat medium liquid circulation circuit by controlling the hot water temperature on the side of the heat medium liquid supply source 54,
Alternatively, the supply or circulation of the heat medium liquid to each of the heat medium liquid circulation pipes 55x, 55y is controlled by opening and closing control of the on-off valves 56x, 56y interposed in the heat medium liquid circulation pipes 55x, 55y, respectively. ing.

[0003]

However, in the case of controlling the temperature of each room in the conventional floor heating device 50,
The on-off valves 56x and 56y are controlled to open and close, respectively, to control the supply or stop of the supply of the heat medium liquid to the heat medium liquid circulation pipes 55x and 55y. Therefore, the temperature of a specific chamber can be appropriately controlled. Fluid pressure fluctuations occur in the supply line of the entire heating medium or in the heating medium circulation circuit of the main pipe system of the entire building, and the boiler 52 or the pump 5
3 has problems such as overloading, or fluctuations in the temperature of the other room or the amount of circulation of the heat medium liquid, making the heating operation unstable. In general, in a floor heating device that constitutes a radiant heating device that heats the entire floor surface of each room or each floor heating area, a heating medium liquid pipe such as a hot water pipe must be laid over the entire floor area. Conventionally, as shown in FIG. 6, a single continuous heat medium liquid circulating pipe is conventionally laid on the entire floor of each room, and accordingly, the heat medium liquid circulation circuit of each room is provided. The design had to be very long. Here, the heat medium liquid (warm water) is cooled while passing through the heat medium liquid circulation circuit of each room by heat exchange with the heat load object of each room. Therefore, in the heat medium liquid circulation circuit of each chamber, as a result of a relatively large temperature drop of the heat medium liquid, the temperature difference between the liquid temperature at the heat medium liquid inlet and the liquid temperature at the heat medium liquid outlet is It will expand considerably. Thus, in the floor heating device having the conventional structure, a relatively large floor surface temperature difference or uneven floor temperature distribution occurs on the floor surface of each room. Moreover, as a structure specific to the floor heating device, the heat medium liquid circulation pipe in each room is designed to be thin and long, and therefore,
The flow resistance or pressure loss of the heat medium liquid circulation pipe is extremely high.

[0004] The inventor of the present application prevents the pressure fluctuation of the main pipe system and the instability of the heating operation, as well as the difference in the temperature of the heat medium between the fluid inlet and the fluid outlet and the high flow rate in the heat medium liquid circulation circuit of each chamber. In order to solve the problem of water resistance, the heat medium liquid circulating circuit of each room is divided into a large number of circuits, and a large number of heat medium liquid circulating circuits having relatively short pipe lengths are arranged in each room. Regarding a large number of heat medium liquid circulation circuits of the chambers, a header unit is arranged for each chamber, and a heat medium liquid supply header and a heat medium liquid reflux header for mutually connecting the heat medium liquid inlets and the heat medium liquid outlets are provided in each chamber. We considered to incorporate it in the header unit. By providing such a header unit, the length of each heat medium liquid circulation circuit in each chamber can be designed to be relatively short. Therefore, it has been found that the problem of the temperature difference between the inlet and the outlet due to the temperature drop of the heat medium liquid and the problem of high water flow resistance of the heat medium circulation pipe are substantially eliminated. Moreover, in the floor heating device provided with such a header unit, the inlet pressure and the outlet pressure of a large number of heat medium liquid circulation circuits connected to the headers are substantially reduced by the flow rate adjustment function and the circulation pressure adjustment function of each header. It was confirmed that the heat medium liquid was adjusted uniformly, and therefore, the heat medium liquid circulated through each heat medium liquid circulation circuit of each chamber at a relatively uniform pressure and flow rate. However, when such a configuration is adopted, since the use form or use time period of each room is different in actual use, the header unit of each room starts the circulation of the heat medium liquid and regulates the circulation amount of the heat medium liquid. And selectively stopping the circulation of the heating medium liquid. On the other hand, the fluid pressure of the heating medium liquid supply main pipe and the heating medium liquid recirculation main pipe connected to the header unit of each chamber is controlled to a predetermined pressure. As a result, a large amount of the heat medium liquid exceeding the required amount of the heat medium liquid may be supplied.

In order to solve such a problem, the inventor of the present application has provided in each header unit a bypass pipe for interconnecting an inlet portion of a heat medium liquid supply header and an outlet portion of a heat medium liquid reflux header. However, in this case, in the header unit of the room that does not require the operation of the floor heating device, an unnecessarily large amount of the heat medium liquid flows into the bypass pipe requiring relatively low water flow resistance, Conversely, for a header unit in another room that requires circulation of the heat medium liquid, a small amount of heat medium less than the required amount of the heat medium liquid is required due to the relatively high water flow resistance of the heat medium liquid circulation pipe. There was a problem that only the liquid could be circulated.

[0006] As a problem specific to the floor heating device of the hot water piping system, it has been pointed out for a long time that there is a possibility of leakage of floor heating piping in each room. However, in recent floor heating devices arranged in middle-high-rise buildings, as described above,
Connect the floor heating pipes of each room to the main supply pipe and main reflux pipe of the heat medium liquid (hot water) piping equipment of the whole building, and connect the floor heating pipes of each room to the heat medium liquid piping system of the whole building. Building equipment design of the form to incorporate is becoming widespread. Such a configuration is practically advantageous because the heat source system can be shared as the whole building equipment and the construction cost and the maintenance cost of the building equipment can be reduced, so that the antifreeze (hot water containing the antifreeze component) is practically advantageous. Not only does this have the disadvantage of having to circulate heated tap water to the floor heating pipes to be accommodated, but also the fluid pressure of the main supply pipe for the heating medium liquid set at a relatively high pressure Has a new problem of directly acting on the floor heating piping of each room. Moreover, in this type of heat medium liquid (hot water) piping system, when the operation of the heat medium liquid circulation system is stopped, for example, during the summer or middle period or during the non-use time period in winter, the head static pressure of the upper floor is increased. Works on floor heating piping in each room on the lower floor. As a result, the floor heating pipes of the lower floor room are suddenly damaged or damaged, or the floor connection pipes fall off unexpectedly in the floor heating pipes of the lower floor room, resulting in floor heating of the lower floor room. Once the pipes begin to leak, such leaks may occur until the heat transfer fluid stored in the heat transfer fluid piping system on the upper floor completely leaks into the room through the floor heating pipes on the lower floor. Let me do it.

Needless to say, such a situation can be solved by shutting off a main plug or a water stop valve of a floor heating pipe of a room in which water leakage has occurred. However, since this type of water leakage may occur at an unexpected time or at a time when no worker is present, a manually operated emergency shut-off valve or water stop valve is temporarily provided in each room, and Even if a strict monitoring system can be maintained, it is necessary to shut off water leakage reliably and promptly.
In reality, it is extremely difficult. It is theoretically possible to arrange a water leak detector or a water leak monitoring device in each room, and to interpose an emergency shut-off valve operating under automatic control in the floor heating pipe of each room. Since the design obviously increases the construction cost and the maintenance cost, it cannot be practically adopted.

The present invention has been made in view of such circumstances, and has as its object to divide a heat medium liquid circulation circuit in each room and to provide a large number of heat medium liquid circulation circuits in each room. In addition, in a method of controlling a floor heating device having a configuration in which a header unit incorporating a heat medium liquid supply header and a heat medium liquid recirculation header that assemble each heat medium liquid circulation circuit are arranged in each room, Without providing an emergency shutoff device, water leak detection device, etc., shuts off the heat medium fluid pressure of the main pipe system acting on the floor heating piping of each room, and particularly prevents water leakage from the floor heating piping on the lower floor, or It is an object of the present invention to provide a control method of a floor heating device which can be automatically stopped. The present invention further provides, in the control method of the above-mentioned method, the activation / deactivation of the floor heating equipment in each room without impairing the basic function of each header unit for controlling a large number of heat medium liquid circulation circuits arranged in each room. It is an object of the present invention to provide a control method of a floor heating device capable of avoiding a change in the heat medium liquid circulation amount of each room header unit which may be caused by the above.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method for controlling a floor heating device for a building having a plurality of rooms requiring floor heating equipment, the method comprising: ) And a heating medium liquid reflux header (6r) are arranged in each chamber, and a supply side branch pipe (5) branched from a heating medium liquid supply line (3) is connected to the heating medium. While connecting to the liquid supply header (5s), a return side branch pipe (6) branched from the return line (4) is connected to the heat medium liquid reflux header (6r), and a plurality of heat medium liquid circulations laid on the floor. Each inlet end and each outlet end of the pipe (7) are connected in parallel to the heat medium liquid supply header (5s) and the heat medium liquid return header (6r), respectively, and the heat medium liquid supply header is connected. (5s) can communicate with the outlet of the heat medium liquid reflux header (6r). A bypass line
(9) is disposed in the header unit (1), a heat medium liquid bypass circuit is formed between the supply side branch pipe (5) and the return side branch pipe (6), and the bypass line (9) is provided. A directional control valve (10) for selectively bypassing the heat medium liquid in the supply side branch pipe (5) to the return side branch pipe (6) through the bypass line (9) and the supply side branch pipe (5) a control unit (11) for controlling the direction control valve (10) in accordance with the temperature of the chamber in which the header unit is disposed, and a bypass unit (9) A check valve (28) is interposed between the connecting portion of the return-side branch pipe (6) and the heat medium liquid recirculation header (6r), and the return-side branch pipe (6) is provided. The check valve (28) is oriented so as to inhibit the backflow of the heat medium liquid from the return line (4), and the supply line (3) and the return line (4) are oriented. ) Is prevented from propagating to the heat medium liquid recirculation header (6r) when the circulation of the heat medium liquid circulation pipe (7) is stopped. I do.

The present invention also provides a method of controlling a floor heating apparatus for a building having a plurality of rooms requiring floor heating equipment, wherein a heating medium liquid supply header (5s) and a heating medium liquid reflux header (6r) are provided inside. Header unit (1) provided in each room, and a supply-side branch pipe branched from the heat medium supply line (3)
(5) is connected to the heating medium liquid supply header (5s), and a return side branch pipe (6) branched from the return line (4).
Is connected to the heat medium liquid reflux header (6r), and each of the inlet end and each outlet end of the plurality of heat medium liquid circulation pipes (7) laid on the floor is the heat medium liquid supply header (5s). And a bypass which can be connected in parallel to the heating medium liquid reflux header (6r), and can mutually communicate an inlet portion of the heating medium liquid supply header (5s) and an outlet portion of the heating medium liquid reflux header (6r). A pipe (9) is provided in the header unit (1), and a heating medium liquid bypass circuit is connected to the supply side branch pipe (5).
And the return-side branch pipe (6), and selectively bypasses the heat medium liquid in the supply-side branch pipe (5) to the return-side branch pipe (6) via the bypass pipe (9). A directional control valve (10) is provided at the connection between the bypass pipe (9) and the supply-side branch pipe (5), and the directional control valve is provided according to the temperature of the chamber in which the header unit is disposed.
A control unit (11) for controlling (10) is provided, and a pressure control valve (1) adjusted based on the heat medium liquid pressure of the heat medium liquid circulation pipe (7) is provided.
2) is interposed in the bypass pipe (9) to prevent fluctuations in the heat medium hydraulic pressure in the supply side branch pipe (5) and the return side branch pipe (6). A control method is provided.

Preferably, the directional control valve (10) is an electric three-way switching valve controlled by the control unit (11), and includes the supply branch pipe (5) and the bypass circuit (9).
And a pressure control valve (12),
Consists of a variably adjustable throttle valve.

[0012]

According to the floor heating device having the above structure according to the present invention,
The heat medium liquid circulation circuit in each room includes multiple heat medium liquid circulation pipes.
(7), and the inlet end and outlet end of each heat medium liquid circulation pipe are connected to the heat medium liquid supply header (1) of the header unit (1) arranged in each room with each room as a basic unit. 5s) and the heat medium liquid reflux header (6r), respectively. This makes it possible to design the pipe length of each heat medium liquid circulating circuit constituting the floor heating equipment of each room to be relatively short, so that the temperature drop effect of the heat medium liquid generated during circulation of the heat medium liquid circulating circuit can be achieved. , The temperature distribution on the floor surface can be made uniform over the entire area of the room, and the water flow resistance of each pipe can be reduced. Further, according to the floor heating device having the above configuration, the inlet pressure and the outlet pressure of the plurality of heat medium liquid circulation circuits are controlled by the flow rate adjustment function and the circulation pressure adjustment function of the heat medium liquid supply header and the heat medium liquid recirculation header. Adjustment, whereby not only the heat medium liquid can be circulated to each heat medium liquid circulation circuit at a relatively uniform pressure and flow rate, but also the inlet portion of the heat medium liquid supply header and the heat medium liquid reflux header. Bypass circuit that can communicate with the outlet
(9) and a directional control valve (10) to form a heat medium liquid bypass circuit between the supply side branch pipe and the return side branch pipe, whereby the heat medium liquid circulation circuit between the headers is formed. By controlling the medium liquid circulation amount, the floor surface temperature can be adjusted to an appropriate temperature. Thus, according to the floor heating device having the above configuration, the floor surface temperature distribution of each room can be made uniform, and the heating efficiency or heat efficiency of each room can be improved, and the difference in the heating conditions or operating conditions of each room can be compensated. Optimization of the heating operation efficiency of each room and optimization of the heating temperature of each room can be realized.

Further, according to the above configuration of the present invention, when the heat medium liquid in the return line (4) can flow back to the heat medium liquid recirculation header (6r), the check valve (28) controls the heat medium liquid. Prevent backflow. Therefore, even if water leaks from the heat medium liquid circulation pipe (7), the fluid that can leak is the indoor piping system (5, 6, 7) of each room.
The water leak is stopped quickly and automatically, limited to a substantially small amount of heat transfer fluid contained in the water. Also supply line (3)
During the period in which the heat medium circulating pressure (dynamic pressure) in the return line (4) is released for a relatively long time, the head static pressure acting on the supply line (3) and the return line (4) is reduced by the check valve (28). ), The heat medium liquid recirculation header
(6r) and does not act directly on the heat medium liquid circulation pipe (7). Therefore, the relatively large head static pressure of the entire heat medium liquid circulation system of the building does not always act on the heat medium liquid circulation pipe (7) in the lower floor room, and the heat medium liquid circulation pipe (7) is damaged. Alternatively, the possibility of damage can be greatly reduced, and the heat medium liquid circulation pipe (7) can be prevented from aging or aging.

Further, in the floor heating apparatus having the above-mentioned configuration, with respect to the temperature control of each room, for example, the room Ra (FIG. 2), the control unit is configured to perform the above-mentioned directions when the temperature of the room Ra is lower than a predetermined set temperature. The control valve (10) is switched to the normal heating operation position, and the heat medium supplied from the supply line (3) is supplied with the heat medium liquid supply header (5s), each heat medium liquid circulation circuit (7), and heat medium liquid recirculation. When the temperature of the chamber Ra exceeds the set temperature, the control unit switches the directional control valve to the bypass circuit side, whereby the heat medium liquid supply header and each heat source are circulated to the header (6r). The supply or circulation of the heat medium liquid to the medium liquid circulation circuit and the heat medium liquid reflux header is stopped, and the heat medium liquid is bypassed to the bypass circuit via the directional control valve. Therefore, according to the configuration of the present invention, the pressure loss (pressure drop) of the heat medium fluid generated when the heat medium liquid passes through the bypass circuit is regulated by the pressure control valve. Here, the pressure regulation function of the pressure control valve is adjusted based on the heat medium liquid pressure of the heat medium liquid circulation pipe (7) and set so as to prevent the fluctuation of the heat medium liquid pressure of the supply side branch pipe. The supply line (3) and the supply side branch pipe which may be generated when the heat medium liquid is bypassed to the bypass circuit.
(5) The other chamber Rb which may be generated due to the pressure drop of the heat medium hydraulic pressure or the excessive bypass flow rate in the bypass circuit.
The problem of insufficient supply of the heat medium liquid is surely avoided.

[0015]

Next, a method for controlling a floor heating device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, the overall configuration of the floor heating device 1 to which the control method of the present invention can be applied will be described with reference to FIG. FIG.
FIG. 1 is a schematic flow chart showing an overall configuration of a fluid circulation circuit of a floor heating device 1. The heat medium supply source 21 includes a boiler 22 and a pump 23. In the supply line 3 of the heating medium liquid,
Heat medium liquid heated by the heat medium liquid supply source 21 (for example,
Antifreeze) is supplied. The heat medium liquid cooled by the heat exchange action of each heat medium liquid circulation pipe 7 returns to the heat medium liquid supply source 21 via the heat medium liquid return line 4. Ra and Rb indicated by virtual lines schematically indicate the respective rooms of the building, and a header unit 2 is installed in each of the rooms Ra and Rb.

FIG. 1 is a schematic flow chart showing the overall configuration of each header unit 2 arranged in each of the chambers Ra and Rb. The configuration of each part of the header unit 2 will be described with reference to FIG. Each header unit 2 arranged in each of the chambers Ra and Rb
Inside the supply side branch pipe 5 branched from the supply line 3 and the return side branch pipe 6 branched from the return line 4.
And are arranged. The input port and the first output port of the three-way switching valve 10 are connected to the supply-side branch pipe 5. The supply-side branch pipe 5 located upstream of the three-way switching valve 10 includes a manually operated on-off valve 25 and a strainer 2.
6 are interposed in the pipeline sequentially from the supply line 3 side. The strainer 26 is disposed so as to remove dust from the main pipe system (supply line 3) that can flow in through the supply-side branch pipe 5, and continuously maintains good operation and operation of the three-way switching valve 10. To work. On the other hand, return side branch pipe 6
, A manually operated opening / closing valve 27 and a check valve 28 are sequentially interposed in the pipeline from the return line 4 side.

On the supply side branch pipe 5 located downstream of the three-way switching valve 10, a heating medium liquid supply header 5 s is disposed, while on the other hand, the return side branch pipe 6 located upstream of the check valve 28 is provided. A heat medium liquid recirculation header 6r is provided in the portion. As shown in FIG. 1, a plurality of hot water pipes 7 laid on the floor have a hot water inlet end and a hot water outlet end of each of the hot water pipes 7, respectively, a supply header 5s and a reflux header 6r.
Connected in parallel. Check valve 28 of return-side branch pipe 6
Are directed in a direction that allows the flow of the hot water from the heat medium liquid reflux header 6r to the return line 4 while preventing the back flow of the heat medium liquid (hot water) from the return line 4 to the heat medium liquid reflux header 6r. You. The hot water pipe 7 is a pipe material formed of rubber, metal, synthetic resin, or the like, and exchanges heat with a heat load object in the room by passing a heat medium liquid (hot water), thereby lowering the temperature. Thus, according to the hot water circulation piping system having the above-described configuration, each header unit 2 through which the heat medium liquid circulates is circulated.
The basic heat medium liquid circulation circuit 8 and a large number of heat medium liquid circulation circuits 7 laid on the floor and having a relatively short pipe length are provided in each chamber.

A bypass pipe (bypass circuit) 9 is connected between the second output port of the three-way switching valve 10 and the portion of the return branch pipe 6 located downstream of the check valve 28. The bypass pipe 9 transfers the heat medium liquid (hot water) flowing out from the second output port of the three-way switching valve 10 to the return-side branch pipe 6.
And the heat medium liquid (warm water) is returned to the return line 4 via the branch pipe 6. A pressure control valve 12 using a throttle valve or the like capable of variably adjusting the pressure is interposed in the straight pipe portion of the bypass pipe 9. In this example, the pressure set value (pressure drop value) of the pressure control valve 12 is set based on the pressure drop or pressure loss of the heat medium liquid circulation circuits 7 and 8, and preferably, the heat medium liquid circulation circuits 7 and 8 Is set to substantially the same pressure drop value or pressure drop value as Three-way switching valve 10
Is a motor-operated control valve, which is controlled by the control unit 11 for switching. The control unit 11 includes a control unit main body 31, a room temperature sensor 32, and a floor temperature sensor 33. In the drawing, reference numerals 35 and 36 denote air vent portions respectively provided on the supply side branch pipe 5 (supply header 5r) and the return side branch pipe 6 (recirculation header 6r). Further, each header unit 2 of each of the rooms Ra and Rb shown in FIG. 2 has substantially the same configuration.

Next, a control method of the present invention applied to the floor heating device 1 will be described with reference to FIGS. Heat medium liquid (hot water) heated by boiler 22 (FIG. 2)
Is supplied to the supply line 3 under the supply pressure of the pump 23, flows through the pipeline of the supply line 3, and the hot water return flows of Ra and Rb in each chamber return to the boiler 22 via the return line 4. . In an arbitrary room, for example, the room Ra, the room temperature and the floor temperature are detected by the room temperature sensor 32 and the floor temperature sensor 33. When the detected temperature is lower than the set temperature, the control unit main body 31 The switching valve 10 is switched to the heating position to open the first output port on the hot water pipe 7 side and close the second output port on the bypass pipe 9 side. As a result, the heat transfer medium supplied from the supply line 3 to the supply side branch pipe 5 is supplied via the three-way switching valve 10 to the hot water pipe 7.
, And sent to the return line 4 via the return-side branch pipe 6. Thus, the floor heating system of the room Ra is
Operates in heating operation mode. Hot water bypass 7
As shown in FIG. 1, the hot water of adjacent indoor floor pipes is arranged alternately or in pairs in the indoor floor area so that the hot water flows in mutually opposite water flow directions. Therefore, the warm water in the upstream portion of the warm water pipe 7 having a relatively high temperature and the reflux water of the warm water whose temperature has been reduced by the heat radiation flow in adjacent areas, so that the indoor floor surface temperature is uniform. Or leveled.

On the other hand, when the detected temperatures of the room temperature sensor 32 and the floor temperature sensor 33 exceed the set temperatures, the control unit 3
1 controls switching of the three-way switching valve 10 to the bypass position, closes the first output port on the hot water pipe 7 side, and switches the bypass pipe 9
Side second output port is opened. Thereby, the supply of the heat medium liquid to the hot water pipes 7 is stopped, and the heat medium liquid (warm water) of the supply side branch pipe 5 is bypassed (bypassed) to the bypass pipe 9 via the three-way switching valve 10. , To the return line 4 via the return side branch pipe 6. Thus, the floor heating facility of the room Ra operates in the bypass operation mode. Preferably, the control unit main body 31 includes a floor temperature sensor 33.
Is given priority over the detection value of the room temperature sensor 32, and the above control is executed substantially based on the detection value of the floor temperature sensor 33.

FIG. 3 is a schematic overall flow chart showing an operation mode of the floor heating apparatus 1, and FIGS. 4 and 5 are schematic flow charts showing an operation mode of the header unit 2 in each room. In the heat medium liquid circulation system shown in FIG.
b: Rc: Rd: Re: Rf each header unit 2
Are connected to the supply line 3 and the return line 4. Room R
Each header unit 2 of a: Rc: Re is maintained in the bypass operation mode, and each header unit 2 of the room Rb: Rd: Rf is maintained in the heating operation mode. Room R
The hot water flow circulating through the header units 2 of a: Rc: Re drops in pressure due to the flow resistance of the pressure control valve 12, and the hot water flow circulating through the header units 2 of the chambers Rb: Rd: Rf is a heat medium. The pressure drops due to the water flow resistance of the liquid circulation circuits 7 and 8. Each header unit 2 of room Ra: Rc: Re
Is switched to the heating operation mode and the room Rb: Rd: Rf
When each of the header units 2 is switched to the bypass operation mode, the hot water flow circulating in each of the header units 2 of the chambers Ra: Rc: Re drops in pressure due to the flow resistance of the heat medium liquid circulation circuits 7 and 8, The hot water flow circulating in each header unit 2 of the chambers Rb: Rd: Rf drops in pressure due to the flow resistance of the pressure control valve 12.

Since the pressure drops in the heat medium circulating circuits 7 and 8 and the pressure drop in the pressure control valve 12 are set to be substantially equal, the pressure fluctuation caused by the above switching control is not affected by the heat medium circulating circuit. Does not occur in the system. Therefore, the heating device 2
The operating load and operating environment of the pump 2 and the pumping device 23 do not fluctuate and are maintained and managed under substantially the same conditions. Header unit 2 for heating operation mode and bypass operation mode
Are schematically shown in FIGS. 4A and 4B, respectively. In the heating operation mode (FIG. 4 (A)), the circulating pressure of the main pipe systems 3, 4 acts on the branch pipes 5, 6 as total pressures (static pressure and dynamic pressure) TP1, TP2, and the total pressures TP1, TP2 The differential pressure is used as the circulation pressure of the heating medium liquid circulation circuits 7 and 8 as the hot water pipe 7 and the supply header 5
s and the reflux header 6r. On the other hand, in the bypass operation mode (FIG. 4B), the heating medium liquid (hot water flow)
Does not circulate through the heat medium liquid circulation circuit (hot water pipe) 7 through the bypass pipe 9. The circulating pressures of the main pipe systems 3, 4 are total pressures (static pressure and dynamic pressure) TP1, T
Acting on the branch pipes 5 and 6 as P2, the total pressures TP1 and T
The differential pressure of P2 acts on the pressure control valve 12 and the bypass line 9. However, the action of the total pressures TP1 and TP2 is
As shown in FIG. 4, the three-way switching valve 10 and the check valve 28
As shown by the broken line in (B), it does not propagate to the hot water pipe 7, the supply header 5s, and the reflux header 6r.

FIG. 5 schematically shows a use state in which the fluid circulation pressure of the main pipe systems 3 and 4 is released. When the pump 23 is stopped in summer or the like and the fluid circulation pressure of the main pipe systems 3 and 4 is released, the water retained in the pipes of the main pipe systems 3 and 4 stops. As a result, in the pipes of the main pipe systems 3, 4,
The head static pressure of the water held in the entire hot water system piping and accumulator of the building generally acts, and the static pressures SP1 and SP2 act on the branch pipes 5 and 6. The action of the static pressures SP1 and SP2 is isolated by the three-way switching valve 10 and the check valve 28, and as shown by the broken line in FIG. 5, the hot water pipe 7, the supply header 5s
And does not propagate to the reflux header 6r. As described above, according to the control method of the present embodiment, the bypass pipe 9
The liquid pressure drop or pressure loss of the heat medium liquid (hot water) flowing through the heat medium liquid (hot water) flowing through the heat medium liquid circulation circuit on the side of the hot water pipe 7 is substantially equal to the liquid pressure drop or pressure loss of the heat medium liquid (hot water) flowing through the heat medium liquid circulation circuit. Therefore, the hydraulic pressure of the entire main pipe system in the supply line 3 and the return line 4 does not fluctuate when the heat medium liquid circulation is stopped (bypass operation mode).
The operating load and operating environment of the boiler 22 and the pump 23 are as follows:
Substantially constant conditions are maintained. Therefore, the boiler 22
The operation control of the pump 23 is stabilized without being affected by the operation mode switching of the header unit 2 of each of the chambers Ra and Rb.

Further, when only the header unit 2 of the chamber Ra (FIG. 2) is switched from the heating operation mode to the bypass operation mode, or is switched from the bypass operation mode to the heating operation mode, the hydraulic pressure fluctuation accompanying this is changed. Does not occur in the header unit 2 of the room Rb (FIG. 2) that continuously maintains the heating operation mode. Therefore, the hydraulic pressure fluctuation or insufficient hydraulic pressure of the header unit 2 of the chamber Rb which may occur transiently with the operation mode switching of the header unit 2 of the chamber Ra,
Alternatively, problems such as flow rate fluctuation or flow rate shortage are reliably avoided. Further, the floor temperature sensor 33 and the room temperature sensor 32
A relatively high temperature is generally detected during a time period or a period during which the boiler 22 and the pump 23 stop operating, for example, in the middle or summer, and as a result, the control unit main body 31 maintains the header unit 2 in the bypass operation mode. I do. The fluid in the pipes of the main pipe systems 3 and 4 is released from the fluid dynamic pressure with the stoppage of the pump 23 in the middle or summer, and as a result, the head static pressure of the entire pipe system is reduced by the header unit 2.
Act on. Such a hydrostatic pressure shows a considerably high pressure value on the lower floor of the building.

However, the hydrostatic pressure of the supply line 3 is shut off by the three-way switching valve 10 and the supply header 5
s and the hot water pipe 7, while the static fluid pressure in the return line 4 is blocked by the check valve 28 and does not propagate to the reflux header 6 r and the hot water pipe 7. Therefore, the pressures in the hot water pipe 7, the supply header 5s, and the reflux header 6r are kept low, and the risk of water leakage in the heat medium liquid circulation circuits 7, 8 is reliably reduced. Also, in the event that cracks, damages or disengagement of joints or the like occur in the hot water pipe 7, the supply header 5s or the reflux header 6r, leakage of the fluid in the supply line 3 is prohibited by the three-way switching valve 10. The leakage of fluid in the return line 4 is prevented by the check valve 28. Therefore, an accident in which a large amount of fluid in the main pipe system leaks to the indoor side via the hot water pipe 7, the supply header 5s, or the reflux header 6r is reliably avoided. Preferably, as the three-way switching valve 10, an electromagnetic three-way valve of a type that is always held at the bypass position (when not energized) is used.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to such an embodiment, and the present invention is not limited to the detailed configuration, shape, quantity, material and the like. Can be arbitrarily changed without departing from the spirit of the invention.

[0027]

As described above, according to the control method of the present invention, the heat medium liquid circulation circuit of each room is divided, and a large number of heat medium liquid circulation circuits are arranged in each room. And a header unit incorporating a heating medium liquid supply header and a heating medium liquid recirculation header that assemble the respective heating medium liquid circulation circuits are arranged in each room. Without providing an emergency shut-off device or a water leak detection device, etc., shuts off the heat medium hydraulic pressure of the main pipe system acting on the floor heating piping of each room, and especially prevents water leakage from the floor heating piping on the lower floor, or This can be automatically stopped. Further, according to the control method of the present invention described in claim 2, in the control method of the above method, the basic function of each header unit that controls a large number of heat medium liquid circulation circuits disposed in each chamber is not impaired. In addition, it is possible to avoid the fluctuation of the circulation amount of the heat medium liquid of each room header unit which may be caused by the operation / non-operation of the floor heating equipment of each room.

[Brief description of the drawings]

FIG. 1 is a schematic flowchart showing an internal configuration of a header unit constituting a floor heating device in each room.

FIG. 2 is a schematic flowchart showing the entire fluid circulation circuit of the floor heating device shown in FIG.

FIG. 3 is a schematic overall flowchart showing an operation mode of the floor heating device shown in FIG.

FIG. 4 is a schematic flowchart showing an operation mode of a header unit in each room.

FIG. 5 is a schematic flowchart of a header unit showing a state at a stop time of a heat medium liquid circulation operation.

FIG. 6 is a circuit configuration diagram of a floor heating device according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor heating device 2 Header unit 3 Supply line 4 Return line 5 Supply side branch pipe 5s Heat medium liquid supply header 6 Return side branch pipe 6r Heat medium liquid reflux header 7 Hot water pipe 8 Heat medium liquid circulation circuit 9 Bypass line 10 Three way Switching valve 11 Control unit 12 Pressure control valve Ra chamber Rb chamber

Claims (2)

[Claims] A method for controlling a floor heating device for a building having a plurality of rooms requiring floor heating equipment, comprising: a heating medium liquid supply header (5s) and a heating medium liquid reflux header (6).
r) is installed in each chamber, and a supply-side branch pipe (5) branched from the supply line (3) for the heat medium liquid is connected to the heat medium liquid supply header (5s). At the same time, a return-side branch pipe (6) branched from the return line (4) is connected to the heat medium liquid reflux header (6r), and each of the inlet ends of a plurality of heat medium liquid circulation pipes (7) laid on the floor. Section and each outlet end are connected in parallel to the heating medium liquid supply header (5s) and the heating medium liquid reflux header (6r), respectively, and the inlet section of the heating medium liquid supply header (5s) and the heating medium liquid supply header (5s). A bypass pipe (9) capable of mutually communicating with the outlet of the heat medium liquid reflux header (6r) is provided in the header unit (1), and a heat medium liquid bypass circuit is connected to the supply side branch pipe.
(5) and the return-side branch pipe (6), and the supply-side branch pipe is formed through the bypass pipe (9).
A directional control valve (10) for selectively bypassing the heat medium liquid of (5) to the return-side branch pipe (6) is provided at a connection between the bypass line (9) and the supply-side branch pipe (5). A control unit (11) for controlling the direction control valve (10) in accordance with the temperature of the chamber in which the header unit is disposed, the bypass line (9) and the return-side branch pipe (6 ) And the heat medium liquid reflux header (6r), a check valve (28) is interposed in the return-side branch pipe (6), and heat from the return line (4) is supplied. The check valve (28) is oriented so as to prohibit the backflow of the medium liquid, and the pressure in the main pipe system including the supply line (3) and the return line (4) is reduced by the heat medium circulation pipe (7). A method for controlling a floor heating device, comprising: preventing propagation to the heating medium liquid reflux header (6r) when circulation is stopped. 2. A method for controlling a floor heating apparatus for a building having a plurality of rooms requiring floor heating equipment, comprising: a heating medium liquid supply header (5s) and a heating medium liquid reflux header (6).
r) is installed in each chamber, and a supply-side branch pipe (5) branched from the supply line (3) for the heat medium liquid is connected to the heat medium liquid supply header (5s). At the same time, a return-side branch pipe (6) branched from the return line (4) is connected to the heat medium liquid reflux header (6r), and each of the inlet ends of a plurality of heat medium liquid circulation pipes (7) laid on the floor. Section and each outlet end are connected in parallel to the heating medium liquid supply header (5s) and the heating medium liquid reflux header (6r), respectively, and the inlet section of the heating medium liquid supply header (5s) and the heating medium liquid supply header (5s). A bypass pipe (9) capable of mutually communicating with the outlet of the heat medium liquid reflux header (6r) is provided in the header unit (1), and a heat medium liquid bypass circuit is connected to the supply side branch pipe.
(5) and the return-side branch pipe (6), and the supply-side branch pipe is formed through the bypass pipe (9).
A directional control valve (10) for selectively bypassing the heat medium liquid of (5) to the return-side branch pipe (6) is provided at a connection between the bypass line (9) and the supply-side branch pipe (5). A control unit (11) for controlling the direction control valve (10) according to the temperature of the chamber in which the header unit is disposed is provided, and the heat medium liquid pressure of the heat medium liquid circulation pipe (7) is provided. A pressure control valve (12) adjusted to the standard is interposed in the bypass line (9), and the supply branch pipe (5) and the return branch pipe are
(6) A method for controlling a floor heating device, wherein the fluctuation of the heat medium fluid pressure in (6) is prevented.